Rankers Physics
Topic: Electrostatics
Subtopic: Properties of Charges

Choose incorrect statement/s : (A) In friction (method of charging), body having high work function will aquire positive charge. (B) In conduction charge transfer takes place till potential of both bodies becomes equal. (C) Inducing body will get opposite nature of charge. (D) Induction is a body phenomena.
Only A
Only B
Both A and C
Both C and D

Solution:

Here’s the reasoning behind the incorrect statements A and C:

(A) Incorrect:

  • In frictional charging, the body with a lower work function (which requires less energy to remove electrons) will lose electrons and acquire a positive charge, while the one with a higher work function will gain electrons and acquire a negative charge. Thus, the statement is reversed.

(C) Incorrect:

  • In induction, the inducing body does not get an opposite charge. Instead, the induced charge on the other body is opposite in nature to the inducing charge, while the inducing body retains its original charge. Therefore, this statement is wrong.

Additional Notes:

  • (B) Correct: In conduction, charge transfer continues until both bodies achieve the same potential.
  • (D) Correct: Induction involves the rearrangement of charges within a body due to the presence of a nearby charged object. It is a property of the body itself.

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